function sw_block(n)
{
	var o = document.getElementById(n+"_block_holder");
	if (!o) return false;

	o.style.display = (o.style.display == "none") ? "block" : "none";
	return false;
}

// not works in firefox :\ but ff 1.5 recalculates with no reload
// window.onresize = function() {location.reload();}
